Trouble with WP7 mango and text

first of all i want to say i love my WP7 Omnia 7 and even more since Mango

just a little problem arised since the update. Since then when one contact from Singapore text me her number is not transmitted and so i can't see her number and having a discussion thread like text and can't answer to it except by sending a spearate text like in old mobile.

the number doesn't appear and the text "newsms" appear instead.

i first thought it was because of international number but i have no problem with my contact from hong kong.

this is happening since my phone has been updated, before that my WP7 could see the number well and other phone as well.

hope i'll get some help here because i haven't meet anyone with this problem

Have you tried turning the phone off or pulling the battery and waiting 30 seconds or so and then starting it back up? Wlcome to WPC The only other things would be a hard reset which would take it back to factory settings (back sure you have a backup) or take it back to where you bought it(?) to see if tech support can figure it out.